Rock-drill.



w. A. SMITH.

ROCK DRILL.-

A PPLICATION FILED `MAY 4.191.?. 1,318,617.

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y Patented Out.14,1919.

APPLICATION FILED MAYI. I9I7.

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I III IIIIIIIII W/A. SMITH.

ROCK DRILL.

APPLICATION FILED IFM/411917.

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UNITED sTATEs EATENT oEEIoE.

WILLIAM A. SMITH` OF DENVER, COLORADO, ASSIGNOR T0 THE DENVER ROCK DRILL MANUFACTURING COMPANY: OF DENVER,'COLORADO, A CORPORATION OF DELA.-

WARE.

ROCKeDRILL.

To all who/n t may concern.' n

Be it known that l, W ILLIAM A. SMITH, a

citizen '0f the United States, residing at Denvelgin the county of vDenver and Slate of Colorado, have invented certain new and 'useful Improvements in Rock-Drills, o'l" 4and at the saine time so construct said piston and parts associated therewith that cleansing'luid can be delivered to the drill bit7 irrespective of the reversal ot the pist-on.

A further and important object. is to provide motive fluid actuating means ot' an effective character for rotating the drill bit and to utilize the exhaust therefrom i'or hole cleansing purposes.

Still another and important object is to provide novel, effective and convenient means for controlling the operation of the mechanism.

`The preferred enibodiment of the invention is illustrated in the accompanying drawings, wherein Figure 1 is a plan view of the drill.

Fig. 2 is a longitudinal sectional View therethrough.

F 3 is a rear elevation with one ot the hand grips in section.

Fig. L1; is a detail side elevation of the rear head and associated parts.

Fig. 5 is a cross sectional view through the d rill rotating motor.

' Fig. G is a detail sectional view of the exhaust controlling valve.

Similar.reference numerals designate corresponding parts in all the figures ot the drawings.

ln the embodiment illustrated, adrill actual ing motor 'is employed.l connirising a cvlinder member. which consists ol' a bodv7 l` a rear head b', and a l'roni head 9. The

front and rear hcads are conncclcd by side bolts 10. The body 7 isv provided with a ypiston hcad chamber 'l1 and thc rcar head S has a neck chamber l2 communicaling wilh the rear end of the chamber 1l. and having an` enlarged rear portion 18. 'lhe i'roni end of the body 7 is provided with a reduced Specification'of Letters Patent Patented Oct. t4, 1919. Application filed May 4, 1917. serial No. 166,377.

' portion il, in which is formed a .forwardly extending neck chamber 15 that conn'nunicatcs with the tront end ot' thc chamber 11',

said neck chamber 15 having' an open t'ront ende Operating i n the cylinder member is a piston, comprising a central head 16 that-reeiprocatcs in thc head chamber Il, said head being provided with integral oppositcly cx-v tending nccks 17 and le, these vnecks being duplicates one ol the other, and operating respect ivcly in the neck chambers 12 and 15. 'l`hc neck 17 is provided contiguous to the hcad 16 with a reduced portion forming an annular channel l5). while the neck 18 has a correspomling portion ,or channel 2t). 'Phe enlarged rear end ot the neck 17, it' will be nolcd, movable into the enlarged p0rlion 11, oi' the ncck chamber 12, while the tront end ot the trout neck 1S is adapted to pass beyond the reduced portion 1.4, in which the neck chamber 15 is located.

Motive tluid, i'nctcrably air, Vis supl'ilied to the machine through a nipple 2l shown in Fig. 1, which nipple ec nmmiicales with a chamber 22 toi-mcd in the upper' portion of the rear hcad. Located at the inner end of the'chambcr is a tapered valve scat Q3, which is rotatably mounted a tapered valve 24 having an' exposed stcnvz). This valve is provided with a longitiulimll channel 2G conununicating with the chamber 00 and said channel has a latcral port Q7 that is movable into and out ot communication with a passageway 2H tormcd longitudinally in the rear head S and the body 7. The passageway has a lateral port 25)' communicating with the enlarged portion 125 ot the neck chamber 12. Another lateral port 3() opens into an annular groove 231 formed inthe trout portion ot the neck chailnher 12. third port 32 opens into an annular groove Etf-i tormcd in the riar portion of the trout neck chamber 1.5.

.Tt will be evident that when motive fluid is admitted to the passageway 28, by turning lhc throttle valve 24 so that the port 27 \vill register with said passageway, motive lluid will be constantly in the rear enlarged portion l?) of lhc neck chamber 12, and Will also enter the grooves 31 and 33 with the hammer piston in the position illustrated in Fig. "2. This motive Huid will lind its way trom the groove 33 into the head chamber l1 in advance of the piston. hcad ie because of '35 n'ieshing wheels 42 located in a. ease 4S the position of the channel 20, whereas the fluid' from the groove 31 will be cut off from admission to the rear of the head 16. The portion of the head chamber 1l in rear ofl said head is, however, open to the atmos- -phcre through an exhaust port 34. As a consequence, ,the motive fluid acting against' the front face ot' the head 16 will drive the vpiston rearwardly until the front portion of the groove or channel 20 is cut off from the groove 33. 'lhe'rearward movement of the piston will of course carry. the groove or channel 19 of the rear neck 17 to a position. where it willI afford communication between the groove 31 and the rear end ot the head chamber 16, whereupon motive fluid will operate against'the ,rear face oit the piston head 16 and drive vthe piston forwardly. When' in this position, the exhaust port 34 .is in communication with the front portion ofthe head chamber'll in advance of the head 16.

The front head 9 is extended to form an.

internalchamber 35 in which is ,rotatably mounted a chuck 256 having an' angular' socket 37 adapted to receive. the drill steel or bit 38, so that while the said steel or bit vcan be readily detaelual, `it .is rotatable with saidf chuck, and is Ifurthermore in a position to be struck by the front end of the. hammer piston. The.' rear portion of the chuck 36 is provided with an integral worm gear 39,

with which meshes a .Worm 40 formed on ashaft 41 ot'a turbine piston. This turbine plston preferably comprises a pair of interformed upon one' side of the front head 9, and including a removable cover orhead 44. One of the wheels 42 has keyed to it, as illustrated at 45, the shaft 41, said shaft being provided with suitable rollerbearings 456 and a step bearing 47. The other wheel is mounted on roller bearings 4S.

Motive fluidl Jf'r'om the supply chamber 22 is delivered to the turbine by means ot a passageway 49, which may have a dust strainer placed therein. The passageway 49 is connected` to the chamber 22 by a valve seat 51 in which is rotatably mounted is a trame 57 carrying a transverse handle` 58, which includes a pair of hand grips 59 and 60, the latter being rotatably mounted on' a transverse bolt 6l. 'lhe hand grip 59 has zin-internal sleeve 62 journaled on a wear and spacing sleeve 63, and carried by said grip is a crank armA 64 having an offset lpin 65 engaged in a slot 66 formed in a crank arm 67 that is clamped as illustrated at 68 upon the projecting-stem 25 of the throttle valve 24. The other hand grip A60, constructed similarly to 59, has a crank arm 69 to which is pivoted a link 70 shown in Figs; 3 and 4. This link 70 is also pivotally cmnected to a, crank arm 71 affixed to the projecting stem 56 of the valve 52. It will thus be evident that an operator grasping the handle of the machine cannot only hold it to its workand direct it 4as desired, but

yby turning the grips,l can independently control the supply-ot1 motive fluid to the drillactuating motor, and also ,to the drill rotating motor.

For the purpose of supplying cleansing fluid to thev drill bit, a tube 72 is employed that is suitably clamped, as illustrated at 73, in the rear wall of the rear head 8. Any suitable means-are provided for supplying liquid to this tube through ports 74. The tube, as shown, extends axially through the neck chamber 12, the head chan-ier 11 and thc-neck chamber 15, and preferably is of suliicient length to enter the bore 75 of the drill bit. ToeffectivelyA support the tube 72. and at the same time prevent danger ot its being jan'imed, the hammer piston is provided with a central bore through which said tube passes. The end portions 76 of this bore are, ot greater diameter than the tube, sor that said tube is spaced from the walls thereof, while therentral portion or substantially. that defined' by the head 1.6,

is -of less diameter, as shown at 77, forming a .sliding fit for the tube. lVith this arvrangement therefore it will be evident that cleansing liquid is directed through the` motorto the drill bit and is carried by the latter to the bottom of the drill holes.`

lt is .also desirable that gaseous fluid be. employed for clearing out the cuttings, and in the present embodiment, the exhaust from the drill rotating motor is employed for this purpose, This exhaust is conducted by a passageway 78 from the rotary motor or turbineinto a `chamber 79 formed tor the purposwin the rear'portion of the chuck 536, and as the rear end ot the drill bit is inthis chamber, .it will be readily apparent that the exhaust has aci-ess to the bore 75. llowever, inasmuch as under some conditions there is'an oversupply ot this exhaust,

anotherpassageway S0 leads from the cham-A the passageway 80. The valve 82v has a suitable operating handle 85. By turning this valve to the desired position, the amount .of exhaust' delivered through the drill bit can .loe varied. i I

For the purpose of lubricating the apparatus, a Alubricant reservoir S6 is formed in.

the rear head 8 and is supplied through a port closed by a removable plug 87. Disl 'Y heapparent to thoseskilled Vin the art, Without yfurther description, and it will be understood that various changes in the size, shape, proportion and minor details of construction. may be resorted to Without departing from the spirit or scope of the ini vention.

Having thus tully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. ln apparatus of the character set forth, l

the combination with a cylinder member, of a 'piston operating therein and comprising a head havingopi'iositely extending necks, meanscontrolled by external portions ot the respective necks for ,supplying motive fiuid alternately to opposite faces-of the head to actiiate the raton, said necks and head having-alined bores ot different diameters longitudinally therethrough, and a fluid conducting tube passing through the piston and heing tree from the walls ot' the bore of greater dian'ieter but engaged with the walls ott-he. hoi-e oi' less diaineter.

2. lu apparatus of the character set forth, the combination with la cylinder member having a piston head chan'iher and elongated neck cliainhers extending from opposite ends thereoi` ot a piston having a head in the head chamber and oppositely extending elongated necks in the neck chambers, said piston having a bore extending axially through the head and both necks and opening at the outer ends ot the latter` a tool holder at one end of one neck chamber and a cleansing lluid condiictiug tube mounted at the opposite end ot lhe other neck chamf her. said tube extending axially ot said neck and head chambers tor delivering cleansing tluid to a drill hit placed in the tool holder, the pistou being reversible to permit either neck to be utilized for delivering the blows and the axial bore and tube permitting such reversal and providing t'oi' the delivery otI the cleansing lluid irresp a-tive ot' which neck is. foremost. and portsicoverwl and uncovcred by the piston irrespective of its reversal for delivering motive fluid to said piston to actuate the same.

3. In drilling apparatus, the combination with l a ,cylinder member having a head.

chamber and oppositel'y extending neck chambers, of a reversible hammer piston having a head operating in the head chain berend oppositely extending necks respectively opera-ting in the necki chambers,

either neck being operable in either neck chamber accordingly as the hammer piston is reversed, means controlled by external i portions of the necks for supplying fluid alternately to opposite. sides of the head, said necks and head having alined bores therethrough independent of the fluid supplying means to the head, and a fluid conducting tube carried by lthe cylinder member andv extending through the bores of the rear neck and the head, said tube permitting the reversal ot the hammer vpiston and cooperating therewith when either neck is rearwardly.

4; In drilling apparatus, the combination with a drill actuating motor and a drill rotating motor, of handle means' for holding the appara-tus to its work-said handle means being movably mounted thereon, means for supplying motive fluid, to the motors, and valve mechanisms for independently controlling the fiuid supply to the motors, said handle means being connected to said valve mechanisms for operating the same.

ln drilling apparatus, the combination with a drill actuating motor and a drill rotating motor, of handle means for holding the apparatus to its work including relatively movable hand grips, means for slipplying motive tluid to the motors, and valve mechanisms for independently controlling ythe supply to the motors and respectively iuotive fluid to the motors, valves n'iounted on the motor, said valves serving to control the How ot actuating tluid to the drill-rotating and drill-actuating motor respectively, means connecting the hand grips and valves tor controlling the movement of the Valves independently, and iueans associated with the drill rotating motor tor rotating the chuck.

7. ln drilling apparatus, the combination with a drill actuating motor and a drill rotating motor, o't a fluid supply receiving chamber, passageway/s Jfor conducting fluid from the chamber to the respective motors, angularly disposed valves lor respectively controlling the passage ot iuid through the passageways, and aliiied actuating devices tor the valves.

8. In drilling apparatus, the combination work, including a plurality of movable hand grips, means for supplying motive fluid to the motors, and valve mechanism controlling the motive fluid supply connected to and operated by the hand grips.

10. In drilling apparatus, the combination with a drill actuating motor and a drill rotating motor, of a transversely disposed.

handle for holding the apparatus to its work including spaced rotatable hand grips, means for supplying motive fluid to the motors, valves for respectively controlling the motive Huid supply to the motors, and connections between the valves and hand grips for vcausing their respective operations on the rotation of said hand grips.

' 11. In lapparatus of the character set forth, the combination with a drill actuating motor, comprising a cylinder member and a reversible hammer piston therein comprising a head havin oppositely extending reduced necks, of a c eansing fluid conducting tube projecting into the hammer piston, said pison head and necks having alined longitudinal bores therethrough that permit the reversal of the piston, with the consequent utilization of either neck as the blow delivery end and the introduction of the tube into the opposite neck, and ports covered and uncovered by the p1ston irrespective of its reversa'l for delivering motive fluid to said piston to actuate the same.v

4.2. In apparatus of the character set forth, the combination with a drill actuating motor comprisinga cylinder member and a reversible hammer piston therein compris- -ing a head having oppositely extending reduced necks, of means controlled by the necks for respectively delivering motive fluid against opposite sides of the head, a chuck for receiving a drill bit having a bore therethrough, a cleansing fluid directing tube mounted at the rear end of the cylinder member and having a delivery end adapted to discharge fluid into the bore of said drill bit, said piston head and necks having alined longitudinal bores therethrough to receive the tube, said necks and bores permitting the reversal of the piston and the consequent utilization of either end as the blow delivery end, while properly controlling the actuating fluid, and furthermore permitting the tube to be entered in either end when so reversed.

13. In apparatus of the character set forth, the combination with a barrel having a .reduced extension, of a hammer piston mounted in the barrel and operating in said extension, a front head for the barrel, a rotatable chuck in the front head having a sleeve portion, the rear end of which overlaps the barrel extension, and means for delivering cleansing fluid between the sleeve` .and extension chuck.

l. The combination with a barrel having a reduced extension, of a hammer piston mounted in the barrel and operating in'said extension, a front head 4for the barrel, a ro\ to a drill bit placed in the tatable chuck in the front .head having a sleeve portion surrounding and spaced from the extension, a drill rotating motor mounted on the barrel, gearing forrotating the chuck from the motor, means for supplying motive fluid to the motor, and means for directing the exhaust from said motor to the space between the reduced extension and the sleeve.

In testimony whereof I afliX my signature in the presence of two witnesses.

Witnesses:

J. W. RoDoLr, GEO. B. I-IEUJER.

WILLIAM A. sMrrH. 

